Why is spiritual knowledge important for Christians?

In John 14:26, Jesus promises the Holy Spirit, who will teach and remind believers of His teachings, providing them with necessary spiritual knowledge. This knowledge is vital as it empowers Christians to fulfill their calling and serve God's purpose on earth. It reassures the believer of the authority and accuracy of the Scriptures, allowing them to engage meaningfully in their faith and witness. Understanding spiritual truths strengthens their resolve amidst a world filled with challenges and misinformation.